/*
   Copyright (c) 2011 Mizar Tools Contributors (mizartools.org)

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
*/
/*  Contributors :
 *	2011-02-18 Marco Riccardi - initial implementation
 *
 */
package org.mizartools.dli;

public class Utility {

    private static final char COMMA = ','; 
    private static final char LEFT_BRACKET = '(';
    private static final char RIGHT_BRACKET = ')';
    private static final char DOUBLE_QUOTE = '"';

    public static int searchSeparationComma(String string) {
		char[] c = string.toCharArray();
		int counter = 0;
		int j = 0;
		boolean isNotToken = true;
		for (int i=0 ; i<c.length ; i++){
			switch (c[i]){
			case COMMA :
				if (isNotToken && counter == 0) return i;
				break;
			case LEFT_BRACKET :
				j = i+1;
				if (isNotToken && j < c.length && c[j] == DOUBLE_QUOTE) {
					i++;
					isNotToken = false;
				}
				if (isNotToken) counter++; 
				break;
			case RIGHT_BRACKET :
				if (isNotToken) counter--; 
				break;
			case DOUBLE_QUOTE :
				j = i+1;
				if (!isNotToken && j < c.length && c[j] == RIGHT_BRACKET) {
					i++;
					isNotToken = true;
				}
				break;
			default :
			}
		}
		return -1;
	}
	
	private Utility(){}
}
